Add Lambda request id

[benkehoe]

The aws_request_id field from the context object should get added to the default set of properties. https://docs.aws.amazon.com/lambda/latest/dg/python-context.html

[jaredcnance]

The library doesn’t have access to the context object currently. Are you asking for a method on the logger that would allow you to add the context? Or are you wanting a lambda_metric_scope that wraps your handler and adds the request id automatically for you?

I’m not sure how much auto-magic we want to add just to eliminate a single call to set_property.

[benkehoe]

I mean, in an ideal world the Lambda Python runtime would put the request id in the environment variables, since we're already using that to populate the context.

I guess it could be a separate lambda_metric_scope decorator, though it seems like in metric_scope if the environment says it's type AWS::Lambda::Function then you'd know to find the context in the arguments.

[jaredcnance]

Makes sense. I think it should be pretty straightforward to scrape the input arguments for the request id.